1870. The earwig and beetle trap (fig. 488.) is often only a hollow cylinder; but from this, if not taken up regularly at certain seasons, the insects escape. A close box, with an inverted truncated cone of glass in the centre, as a hopper, is better; because, when earwigs, beetles, woodlice, or such insects enter, they cannot escape, and may be drowned or scalded, or suffered to die there. The common bait is crums of bread.